Application of nanocomposite cellulose fibers with luminescent properties to paper functionalization

Abstract

Cellulose fibres modified with the luminescent inorganic compound were obtained by using N-methylmorpholine-N-oxide as a direct solvent. The fibres were cut and introduced to the unrefined and refined paper pulp samples. Schopper-Riegler value of the pulps were measured and the laboratory paper samples were formed. Observations under UV radiation showed that the cellulose luminescent fibres were randomly and even scattered in the paper and were well visible. Measurements of the paper properties such as tensile index, Elmendorf tear resistance, Bendtsen air permeability, Bendtsen roughness, folding endurance, bursting strength and tensile energy absorption were carried out and the scanning electron microscopy (SEM) analysis was used for the assessment of the paper structure and the bonding properties of the luminescent fibres. SEM analysis showed that the cellulose man-made fibres create microfibril network and have excellent compatibility with the paper. The results showed that cellulose man-made fibres with luminescent properties express similar properties to natural cellulose fibres (e.g. external fibrillation and bonding properties) which are useful for the purpose of secure paper production. Cellulose man-made fibres introduced to the paper do not have any disadvantageous impact on paper properties.

A comparative study of the effect of cellulose-based deep coating and pulp refining on the structural and mechanical properties of paper

“…This method can create cellulose fibers with unique properties, such as electrically conductive, luminescent, and antibacterial properties, among others. Research by Erdman et al (2016) showed that cellulose fibers functionalized in this way are very resistant to mechanical impacts and aging factors. It was found that even in the case of mechanical damage of the fiber structure, the substance used for its functionalization remained in the structure and did not release into the environment.…”

Preparation and properties of dual-wavelength excitable fluorescent Lyocell fibers and their applications in papermaking

“…Erdman et al (Erdman et al, 2016) investigated the application of monowavelength excitable fluorescent Lyocell fibers modified with cerium fluoride that had been doped with terbium particles (Ce 0.85 Tb 0.15 F 3 ) to paper functionalization. They showed that there were no significant changes in either measured structural or strength properties upon introduction of monowavelength excitable fluorescent Lyocell fibers to the paper.…”

Upconversion luminescence in cellulose composites (fibres and paper) modified with lanthanide-doped SrF2 nanoparticles

“…cellulose. 37 This means lyocell fibres could have better binding properties. These properties can be further increased by fibre fibrillation during the refining process.…”